Also kre-. [f. CREATINE + -INE.] An alkaline crystallizable substance C4 H7 N3 O, a normal constituent of urine and of the juice of muscular flesh.
1851. Carpenter, Man. Phys., 443. By the action of strong acids, kreatine may be readily converted into kreatinine.
1869. Roscoe, Elem. Chem., 383. Creatinine crystallizes in colourless prisms.
